A355636 - cp's OEIS frontend

A355636 a(1) = a(2) = 1; for n > 2, a(n) is the smallest positive number that has not yet appeared that has the same number of divisors as the sum a(n-2) + a(n-1) but does not equal the sum.

n	a(n)
1	1
2	1
3	3
4	9
5	18
6	6
7	30
8	100
9	24
10	12
11	196
12	48
13	20
14	28
15	80
16	60
17	72
18	84
19	90
20	40
21	42
22	8
23	32
24	54
25	10
26	729
27	2
28	14
29	81
30	15
31	108
32	21
33	22
34	5
35	26
36	7
37	27
38	33
39	96
40	34
41	56
42	126
43	66
44	320
45	35
46	38
47	11
48	4
49	39
50	13
51	44
52	46
53	132
54	51
55	55
56	57
57	162
58	58
59	140
60	150
61	70
62	156
63	62
64	65
65	17
66	69
67	74
68	77
69	19
70	160
71	23
72	82
73	78

[1, 1, 3, 9, 18, 6, 30, 100, 24, 12, 196, 48, 20, 28, 80, 60, 72, 84, 90, 40, 42, 8, 32, 54, 10, 729, 2, 14, 81, 15, 108, 21, 22, 5, 26, 7, 27, 33, 96, 34, 56, 126, 66, 320, 35, 38, 11, 4, 39, 13, 44, 46, 132, 51, 55, 57, 162, 58, 140, 150, 70, 156, 62, 65, 17, 69, 74, 77, 19, 160, 23, 82, 78]

cp's OEIS Frontend

A355636 a(1) = a(2) = 1; for n > 2, a(n) is the smallest positive number that has not yet appeared that has the same number of divisors as the sum a(n-2) + a(n-1) but does not equal the sum.

Table of values

List of values

n	a(n)
1	1
2	1
3	3
4	9
5	18
6	6
7	30
8	100
9	24
10	12
11	196
12	48
13	20
14	28
15	80
16	60
17	72
18	84
19	90
20	40
21	42
22	8
23	32
24	54
25	10
26	729
27	2
28	14
29	81
30	15
31	108
32	21
33	22
34	5
35	26
36	7
37	27
38	33
39	96
40	34
41	56
42	126
43	66
44	320
45	35
46	38
47	11
48	4
49	39
50	13
51	44
52	46
53	132
54	51
55	55
56	57
57	162
58	58
59	140
60	150
61	70
62	156
63	62
64	65
65	17
66	69
67	74
68	77
69	19
70	160
71	23
72	82
73	78

n	a(n)
1	1
2	1
3	3
4	9
5	18
6	6
7	30
8	100
9	24
10	12
11	196
12	48
13	20
14	28
15	80
16	60
17	72
18	84
19	90
20	40
21	42
22	8
23	32
24	54
25	10
26	729
27	2
28	14
29	81
30	15
31	108
32	21
33	22
34	5
35	26
36	7
37	27
38	33
39	96
40	34
41	56
42	126
43	66
44	320
45	35
46	38
47	11
48	4
49	39
50	13
51	44
52	46
53	132
54	51
55	55
56	57
57	162
58	58
59	140
60	150
61	70
62	156
63	62
64	65
65	17
66	69
67	74
68	77
69	19
70	160
71	23
72	82
73	78

n	a(n)
1	1
2	1
3	3
4	9
5	18
6	6
7	30
8	100
9	24
10	12
11	196
12	48
13	20
14	28
15	80
16	60
17	72
18	84
19	90
20	40
21	42
22	8
23	32
24	54
25	10
26	729
27	2
28	14
29	81
30	15
31	108
32	21
33	22
34	5
35	26
36	7
37	27
38	33
39	96
40	34
41	56
42	126
43	66
44	320
45	35
46	38
47	11
48	4
49	39
50	13
51	44
52	46
53	132
54	51
55	55
56	57
57	162
58	58
59	140
60	150
61	70
62	156
63	62
64	65
65	17
66	69
67	74
68	77
69	19
70	160
71	23
72	82
73	78